Flowmaster Force II Cat-Back
Fits 2011-2014 3.5L EcoBoost
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Price tracked 14 times since Jul 12, 2026 at the stores we check daily, not eBay: low $1,299.95, high $1,299.95, currently $1,299.95.
where to buy · 3 retailers tracked
A cat-back exhaust replaces the piping and muffler from the catalytic converter back, using Flowmaster's chambered-muffler design for a deep tone.
why this one — Force II is one of Flowmaster's louder, more aggressive chambered tunings, built here for first-gen (2011-2014) 3.5L trucks.
No manufacturer or independent dyno figure found for this specific product. Cat-backs on turbo trucks with a downpipe/tune doing the real work typically carry no standalone gain claim; sound/tone is the primary value prop.
Estimated from comparable claims: MBRP ~+5 whp; Corsa +12; Flowmaster 11; Flowmaster 18
Questions about this category
No published gain figure for this part, and nothing here is a guarantee. Price is a list price and can lag the retailer; confirm at checkout. See how we check a price and our affiliate disclosure.